Larian have updated Baldur's Gate 3 with Hotfix #35, which includes more improvements to their Native Linux build supported on the Steam Deck with SteamOS.

Did you miss it getting a Native version? See the previous GamingOnLinux article for the info. They're still specifically calling it "Steam Deck Native", but it's just a Native Linux version with tweaks for the Steam Deck included. It will be interesting to see how this sort of language evolves, especially with the new upcoming Steam Machine.